Alert archive / North Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 500

April 15, 200732 counties in North Carolina; 19 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2007, 7:39 AM EDT for 32 counties in North Carolina; 19 counties in South Carolina. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 15, 2007, 7:39 AM EDT (11:39 UTC)
Expired
Apr 15, 2007, 8:45 AM EDT
In force
66 min
Issued by
the Storm Prediction Center
All 51 counties

Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Chatham County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Edgecombe County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wake County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Bamberg County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 91 km from the middle of the area, began a volume at 11:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 11.7 hours before the alert went out and 166 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 2007-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2007-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
329 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 10:10 PM EDTMesoscale DiscussionSPCAnson, Union95 min
Apr 15, 2:01 AM EDTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson7 hr
Apr 15, 3:33 AM EDTMesoscale DiscussionSPCAlamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 21 more87 min
Apr 15, 8:08 AM EDTTornado WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 29 more7 hr
Apr 15, 11:15 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 37 more2 hr
Apr 15, 12:19 PM EDTMesoscale DiscussionSPCAlamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 29 more86 min
Apr 15, 12:42 PM EDTTornado WatchSPCAlamance, Alexander, Anson, Bertie, Burke, Cabarrus and 44 more7 hr
Apr 15, 2:40 PM EDTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more65 min
Apr 15, 2:50 PM EDTTornado WatchSPCBeaufort, Carteret, Craven, Cumberland, Dare, Duplin and 14 more5 hr
Apr 15, 4:12 PM EDTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Camden, Carteret, Chatham and 41 more2 hr
Apr 15, 3:57 AM EDTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 12 more93 min
Apr 15, 10:20 AM EDTMesoscale DiscussionSPCJasper55 min

Nearby

Mesoscale Discussions in North Carolina, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.